3 red lights on semi-circular craft moving VERY FAST on 10/30/08 at ~8:30pm in the SE sky over Nashua, NH.

My husband and I were watching TV at about 8:30 on 10/30/08 and we heard the roar of supersonic jet engines over our rooftop. We went to the front porch to see what it was and instead our eyes were drawn to a fast moving semi-circular set of 3 blinking lights on something that was moving VERY FAST, horizontally, in the southeast sky. The blinking lights appeared to be below the craft. It was pitch black outside and difficult to see above the blinking lights. We were spooked when it dropped sharply and vertically below the tree line. We went back inside and again heard the roar of the jet engines. I spoke with my neighbor about it and he said military jets were in our neighborhood last night. He's an airplane mechanic at a military base nearby. He did not come out to check it out because he recognized the jet engine sound.